Video player software encryption and decryption demand

我们是一家线下教育培训机构，现在每天上课的所实录的教学MP4视频需要发给学生拿回家自行学习，但是不想让这个视频对外任意传播，也不想让学生拿我们的视频通过网络来售卖。我们希望通过硬件加密的形式来对视频进行加密,防止视频传播。需要开发：视频加密软件、硬件加密狗U盘、加密视频播放器三个部分。

具体形式如下：

1、我们每天将视频通过加密软件处理后变成加密过后的视频，学生可以通过网络或者线下拷贝的方式获取加密后的视频源文件。

2、学生通过我们给他们配发的“加密狗（U盘）”插在自己的电脑上。

3、电脑首先预装有我们特制播放器。插入“加密狗”之后播放器上会显示这个学生的身份信息，名字、性别、电话、班级期数等信息。

4、完成身份验证过程之后，可以通过该特制播放器进行自由的播放，播放器面板可以选择样式，放上我们的品牌信息。视频的播放清晰度不会受影响，可以自由的快进、快退、可以完成0.1-—5.0倍速的快速或慢速播放,能保持音轨一致。

5、视频的加密软件，可以定向指定某一期班级的学生可以解密播放该视频。而其他班级的学生，即使有加密狗并下载了该视频加密源文件之后依然无法解密该视频。

6、视频加密软件需要达到后台控制功能。可以实时在线显示都有哪期班级的学员（班级期数、名字、联系方式），在看哪一阶段的视频。并且如果有同一个加密狗在两台机器上播放视频话，我们可以直接冻结该加密狗的使用权限，使其不能播放。

7、加密狗，不可以被复制，不可以被破解，并且要具备一定的后期内部软件升级空间，根据我们的需要往其中加入新功能，如果被破解，我们是不会通过最终审核的。

We are an offline education training institution. Currently, we need to prepare the teaching MP4 video recorded every day for the students to study at home. However, the videos should not be shared randomly and sold online by our students. Therefore, we decide to encrypt the videos through hardware encryption to prevent the spread of the videos. It is necessary to develop three parts including video encryption software, USB softdog, and encrypt video player.

The specific requirements are as follows:

 1, We need to encrypt videos every day with the encrpytion software. The students can obtain the encrypted videos through online or offline copy.

2, The students plug the "softdog (usb)" we give them in their computers.

3, The computers should be pre-installed with our special player. After plugging in the "softdog", the player will show the student's identity information including name, gender, phone number, class and term.

4, After completing the authentication process, the videos can be freely played in the special player. The students can select the styles of the player in the interface of the player and we also can show our brand in the player. The definition of the videos will not be affected. The videos can be freely sped or rewound. Besides, 0.1 to 5.0 times of speeding and rewinding can be achieved and the audio track can stay the same .

5, The encryption software of the video can be specifically available to the students of a particular class. While, the students in other classes will not be able to decrypt the videos even if they have softdog and download the encrypted source files of the videos.

 6, The video encryption software should realize background control. It should be able to display the students of a particular class as well as the videos they watch on line and in real time. Moreover, if one softdog is used to play videos in two computers, we should be able to directly freeze its permission and terminate the playing.

7, The encryption dog can not be copied and cracked. Besides, it should have certain space for the later internal software upgrade so that we can add new function according to our demands. If it is cracked, it will not pass our final review.

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项目ID： #8475110

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